How to hang a picture on a banner with invisible nails?

The seamless wall nail has three small steel nails, which will not damage the wall. There are almost no traces outside, and there is little damage to the wall. Suitable for all kinds of walls, used to hang photo frames and wall paintings. Dear friends, please pay attention to the bearing limit of nails before hanging! ! Usage: Use a hammer to gently knock three small nails on the hook into the wall! Tips: 1, can't be used on plastic products. 2, ceramic tile metope, nails should be hit in the joint, so as not to damage the surface of ceramic tile. 3. Don't be overweight (bearing 2KG). 4. Fragile articles, valuables and dangerous goods should not be hung. 5, to choose the nail surface strength, avoid long-term fall off the cement surface, wood rot, make hanging items fall, causing damage. Usage: Step 1: The small nose of the hook is facing up and gently nailed to the wall with a hammer. Step 2: Hang it up.